Maritime Aquarium at Norwalk
10 North Water Street
Norwalk, CT
The aquarium that tells the story of Long Island Sound, from harbor seals and sand tiger sharks to the tiny creatures of the salt marsh, right on the Norwalk waterfront.
The Maritime Aquarium at Norwalk is devoted to a single body of water: Long Island Sound, the great estuary between Connecticut and Long Island that laps at the city's doorstep. Rather than showcasing tropical reefs or distant oceans, it introduces visitors to the seals, sharks, fish, and shoreline creatures that actually live in and around the Sound, making it feel like a window straight into the water outside.
Set in a converted 19th-century ironworks building on the Norwalk River, the aquarium pairs big habitat tanks and a popular outdoor harbor seal exhibit with hands-on touch experiences and, in season, study cruises that take visitors out onto the Sound aboard a research vessel. It is at once a family destination and a working center for the science and stewardship of a heavily used, much-loved coastal waterway.
What Guests Love
- Harbor seals at play in their outdoor exhibit, a favorite at feeding time
- A shark and ray touch experience and floor-to-ceiling Sound habitat tanks
- A focus on the local waters of Long Island Sound rather than distant oceans
- Study cruises out onto the Sound aboard the aquarium's research vessel
Worth Knowing
- Weekends and school holidays are busiest; timed tickets and early arrival help
- Seal and other feedings run on a daily schedule worth checking when you arrive
- Boat study cruises on the Sound are seasonal and booked separately from admission
- The aquarium sits in walkable SoNo, so plan to combine it with the waterfront district
Details
Norwalk, CT
Learn about Maritime Aquarium at Norwalk
The waters of Long Island Sound
Long Island Sound is an estuary, a place where fresh water from rivers meets salt water from the sea, and that mixing makes it extraordinarily productive. The aquarium's exhibits follow the Sound from its salt marshes and tidal flats out to its deeper open water, introducing the animals that depend on each zone.
Signature residents include harbor seals, whose outdoor pool is a perennial favorite, especially at feeding time, and sand tiger sharks and rays in the aquarium's large tanks. Smaller exhibits reveal the less showy but vital life of the Sound: horseshoe crabs, jellyfish, river otters, and the fish that fill the estuary's food web.
Because it centers a real and nearby place, the aquarium doubles as an argument for caring about that place. Exhibits weave in the Sound's history of pollution and recovery, and the everyday choices that affect the water so many people fish, sail, and swim in.
Hands-on and out on the water
Touch experiences are a big part of a visit. Guests can reach into shallow tanks to feel the rough skin of small sharks and the wings of rays, and meet the creatures of the tide pool and salt marsh up close, guided by aquarium educators.
In the warmer months the aquarium runs study cruises out onto Long Island Sound aboard its research vessel. Passengers help haul a trawl net and sort the catch, examine plankton under the microscope, and learn to read the Sound as scientists do, all with the Norwalk Islands and open water around them.
The aquarium also cares for animals in need, taking part in the rescue and rehabilitation of stranded sea turtles and seals, and its programming connects visitors to that conservation work.
The building and the waterfront
The aquarium occupies a restored 19th-century industrial building along the Norwalk River, part of the wider revival of the South Norwalk, or SoNo, waterfront. Once a district of ironworks, oystering, and shipping, the area fell on hard times before a preservation-minded renewal turned its brick storefronts into a lively riverside neighborhood.
The aquarium opened in 1988 as a cornerstone of that revival, giving the old maritime district a new identity built around the Sound itself. Norwalk's oystering heritage still shapes the area, and the harbor outside remains a working waterfront.
From the aquarium it is a short walk to SoNo's restaurants and shops, and in season a ferry runs out to Sheffield Island and its historic lighthouse in the Norwalk Islands.
Season by season
Spring brings migrating fish and birds to the Sound and the start of the boat cruise season, a fresh time to pair the aquarium with the waking waterfront.
Summer is peak season, busy with families, with study cruises in full swing and the SoNo district at its liveliest, so timed tickets and early arrival help.
Fall quiets the crowds while cruises often continue into the season, and the surrounding coast is pleasant for walking.
Winter turns the visit fully indoors and cozy, a good rainy-or-cold-day destination, though outdoor exhibits and cruises run on reduced schedules.
Closest Boutels
The closest Boutel™ stays, so you can turn this stop into an overnight. Each is an independently owned, editorially selected place to stay.
Things to Do Near Norwalk
SoNo (South Norwalk)
About a quarter mile, a short walk
Norwalk's restored waterfront district of 19th-century storefronts, restaurants, galleries, and the seasonal ferry to Sheffield Island lighthouse.
Lockwood-Mathews Mansion Museum
About 1 mile, a 5 minute drive
A 62-room Second Empire Gilded Age chateau with a skylit rotunda and extraordinary hand-carved interiors, one of America's earliest grand mansions.
Sherwood Island State Park
About 7 miles, a 15 minute drive
Connecticut's oldest state park, a Long Island Sound beach in Westport with wide sand, salt marsh, and open water views.